1As the offshore exploitation moving to deeper waters, ocean currents would become 2 more prevailing hydrodynamics on pipelines, and meanwhile the sloping seabed is 3 always encountered. The prediction of lateral soil resistance is vital in evaluating the 4 pipeline on-bottom stability. Unlike the previous pipe-soil interaction models mainly 5 for horizontal seabed conditions, a pipe-soil interaction model for current-induced 6 downslope and upslope instabilities is proposed by using limit equilibrium approach.
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